660155555011 has 2 divisors, whose sum is σ = 660155555012. Its totient is φ = 660155555010.

The previous prime is 660155554997. The next prime is 660155555021. The reversal of 660155555011 is 110555551066.

660155555011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-660155555011 is a prime.

It is not a weakly prime, because it can be changed into another prime (660155555021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330077777505 + 330077777506.

It is an arithmetic number, because the mean of its divisors is an integer number (330077777506).

Almost surely, 2^660155555011 is an apocalyptic number.

660155555011 is a deficient number, since it is larger than the sum of its proper divisors (1).

660155555011 is an equidigital number, since it uses as much as digits as its factorization.

660155555011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112500, while the sum is 40.

It can be divided in two parts, 6601555 and 55011, that added together give a palindrome (6656566).

The spelling of 660155555011 in words is "six hundred sixty billion, one hundred fifty-five million, five hundred fifty-five thousand, eleven".